Spyridon Antoniou, S. Kapsalis, P. Panagiotou, K. Yakinthos
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An L9 orthogonal array (OA) was used to investigate the influence of these key design parameters using three performance criteria, namely the angle at which pitch break occurs, the corresponding speed and the distance between the Neutral point of each configuration and the Neutral point of the reference platform. The investigation was conducted by using high-fidelity Computational Fluid Dynamics (CFD) methods for each of the nine configurations defined by the L9 OA, over a range of angles of attack between −4 and 16 degrees. Based on these results, and using a Signal-to-Noise ratio (SNR) analysis, two combinations were eventually derived, one that optimized pitch break angle and speed and one that optimized longitudinal stability. Finally, the Pareto Analysis of Variance (ANOVA) technique was conducted to define the contribution of each of the six design parameters on the selected performance criteria. More specifically, the semi-span seemed to have the most significant effect on pitch break angle and speed, whereas the rotation of the slat element was the most important parameter with regard to static stability.","PeriodicalId":50845,"journal":{"name":"Aerospace America","volume":"478 1","pages":""},"PeriodicalIF":0.1000,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Parametric Investigation of Leading-Edge Slats on a Blended-Wing-Body UAV Using the Taguchi Method\",\"authors\":\"Spyridon Antoniou, S. Kapsalis, P. Panagiotou, K. Yakinthos\",\"doi\":\"10.3390/aerospace10080720\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The current study investigated the effect of leading-edge slats on the longitudinal stability at high angles of attack of a Blended-Wing-Body (BWB) Unmanned Air Vehicle (UAV). Using a Design of Experiments (DOE) approach and, specifically, the Taguchi method, four leading-edge slat design parameters were investigated on three different levels. These parameters were the slat semi-span, the rotation of the slat element, the extension forward of the leading edge and the downward drop below the leading edge. An L9 orthogonal array (OA) was used to investigate the influence of these key design parameters using three performance criteria, namely the angle at which pitch break occurs, the corresponding speed and the distance between the Neutral point of each configuration and the Neutral point of the reference platform. The investigation was conducted by using high-fidelity Computational Fluid Dynamics (CFD) methods for each of the nine configurations defined by the L9 OA, over a range of angles of attack between −4 and 16 degrees. Based on these results, and using a Signal-to-Noise ratio (SNR) analysis, two combinations were eventually derived, one that optimized pitch break angle and speed and one that optimized longitudinal stability. Finally, the Pareto Analysis of Variance (ANOVA) technique was conducted to define the contribution of each of the six design parameters on the selected performance criteria. 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引用次数: 0
摘要
研究了翼身混合飞行器(BWB)前缘板条对其大迎角纵向稳定性的影响。采用实验设计(Design of Experiments, DOE)方法,具体地说,采用田口法,在三个不同的水平上研究了四个前缘板的设计参数。这些参数分别是板条半跨、板条单元的旋转、前缘向前延伸和前缘以下向下下降。采用L9正交阵列(OA),通过三个性能标准,即俯距断裂发生的角度、相应的速度以及每种构型中性点与参考平台中性点之间的距离,研究了这些关键设计参数的影响。研究人员使用高保真计算流体动力学(CFD)方法对L9 OA定义的9种构型进行了研究,攻角范围在- 4到16度之间。基于这些结果,并使用信噪比(SNR)分析,最终导出了两种组合,一种优化了俯仰角和速度,另一种优化了纵向稳定性。最后,采用帕累托方差分析(ANOVA)技术来确定六个设计参数对所选性能标准的贡献。更具体地说,半跨似乎对俯仰角和速度的影响最显著,而板条单元的旋转是最重要的静稳定性参数。
Parametric Investigation of Leading-Edge Slats on a Blended-Wing-Body UAV Using the Taguchi Method
The current study investigated the effect of leading-edge slats on the longitudinal stability at high angles of attack of a Blended-Wing-Body (BWB) Unmanned Air Vehicle (UAV). Using a Design of Experiments (DOE) approach and, specifically, the Taguchi method, four leading-edge slat design parameters were investigated on three different levels. These parameters were the slat semi-span, the rotation of the slat element, the extension forward of the leading edge and the downward drop below the leading edge. An L9 orthogonal array (OA) was used to investigate the influence of these key design parameters using three performance criteria, namely the angle at which pitch break occurs, the corresponding speed and the distance between the Neutral point of each configuration and the Neutral point of the reference platform. The investigation was conducted by using high-fidelity Computational Fluid Dynamics (CFD) methods for each of the nine configurations defined by the L9 OA, over a range of angles of attack between −4 and 16 degrees. Based on these results, and using a Signal-to-Noise ratio (SNR) analysis, two combinations were eventually derived, one that optimized pitch break angle and speed and one that optimized longitudinal stability. Finally, the Pareto Analysis of Variance (ANOVA) technique was conducted to define the contribution of each of the six design parameters on the selected performance criteria. More specifically, the semi-span seemed to have the most significant effect on pitch break angle and speed, whereas the rotation of the slat element was the most important parameter with regard to static stability.